DIR xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
   DIR Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - Refresh Types (1854)
        
       Image:
       refresh_types.png
        
       The hardest refresh requires both a Mac keyboard and a Windows
       keyboard as a security measure, like how missile launch systems
       require two keys to be turned at once.
        
       Comics reproduced from www.xkcd.com under license.
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